Fix PR32377: can't determine dependence

[Sebastian Pop]

Hi,

We used to fail to provide a useful representation of a dependence
relation in the case where the number of iterations was not known, or
was a symbolic expression: the number of iterations is used to compute
the last conflicting iteration, but is not needed for computing the
first conflicting iteration and the next ones.  This patch rewrites a
part of the dependence analysis test that was stopping the computation
too early, for providing more precise dependence relations.

Regstrapped on amd64-linux, committed to trunk.

Sebastian
--
AMD - GNU Tools
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 820_pr32377.diff
Type: text/x-patch
Size: 9103 bytes
Desc: not available
URL: <http://gcc.gnu.org/pipermail/gcc-patches/attachments/20071031/9dfa87fd/attachment.bin>